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Auth0 is bought for two reasons: it does identity exhaustively, and it comes with the certifications a procurement team asks for. Pithy competes with the first reason and does not compete with the second at all. Which of those you are buying decides this quickly.
Choose Auth0
When somebody else's security questionnaire decides it.
Enterprise SSO, SAML, SCIM provisioning, an extensive rules and actions pipeline, tenancy models, and the compliance attestations that make a procurement review short. None of that is in the kit, and none of it is a weekend of work to build.
Choose Pithy
When you are shipping a product, not passing an audit.
Passwordless sign-in against your own D1, inside the Worker you already deploy, with the session already understood by payments, storage and the audit trail. No user directory in someone else's account, no per-user pricing, and no integration to keep in sync.
On this capability alone
| Feature | Auth0 | Pithy |
|---|---|---|
Identity | ||
| Passwordless sign-in Pithy: magic link, email OTP, Google and Apple | Yes | Yes |
| Enterprise SSO, SAML, SCIM Auth0: the reason most people buy it Pithy: not offered, and not planned | Yes | No |
| Extensible auth pipeline Auth0: actions and rules running on their platform Pithy: middleware in your own Worker, which is more direct and less managed | Yes | Partial |
| Breadth of social connections Auth0: dozens, maintained Pithy: Google and Apple, with GitHub and Facebook documented | Yes | Partial |
| Compliance attestations Auth0: SOC 2, ISO and the rest, as a product feature Pithy: your Cloudflare account inherits Cloudflare's; the application layer is yours to attest | Yes | No |
| Your users live in your database Auth0: in an Auth0 tenant Pithy: in the D1 your Worker already queries | No | Yes |
| Audit trail across the whole backend Auth0: logs for identity events Pithy: one trail covering refunds, entitlements, secrets and configuration, attributed to the actor | Partial | Yes |
| No per-active-user pricing Pithy: Cloudflare bills what your Worker runs | No | Yes |
The saffron tick marks where Pithy leads — not that the other column is absent. Every claim about Auth0 was checked against their own documentation on 2026-08-25; both products change, and this page is a snapshot rather than a maintained contract.
Where Auth0 wins
If a customer's security review is what stands between you and a contract, an identity vendor with the certifications is the shortest path there, and building your own is the longest.
SAML against an identity provider you have never heard of, SCIM provisioning, per-tenant connection settings. Pithy does none of it.
Two decades of edge cases in identity are encoded in that product. A passwordless kit meets a fraction of them, because it deliberately serves a fraction of the cases.
Importing an existing user base, including hashed passwords from another provider, is a supported path. Pithy has no password to import, which is a clean stance and an awkward migration.
If you sell to enterprises, buy Auth0 and do not think about it again. If you are building a consumer or mobile product where nobody will ever ask you for SAML, then a hosted directory holding your users — priced per user, integrated by webhook — is a dependency you are carrying for a requirement you do not have.